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(No Model.) l J. W. BIRCH.

DEVICE FOR CUTTING CFF THE PLOW OIGASVTO GAS BURNEIIS.

Patented Nov. 9, 1886.,

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INVBNTOR IogmMIN'. B im' 0I.

WITNESSBS: my@

BY fa l lis ATTORNEYS .iso

Uniti-:n STATES ATENT FFICE@ JOSEPH WV. BIRCH, OFVNEV'YORK, N. Y.,ASSIGNOR OF ONE-HALF TO STEPHEN T. SMITH, OF SAME PLACE.

DEVICE FOR CUTTING OFF THE FLOW OF GASTO GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 352,391, dated November9, 1886.

Application filed March 11` 18.?6.

To @ZZ whom t may concern: Be it known that I, Josnrn W. BIRCH, citizenof the United States, residing at New York, in the county and StateotNew York, have invented new and useful Improvements in Devices forCutting Off the Supply of Gas to Burners, of which the following is aspecification.u

This invention has for its object to provide a gas-burner with novelmeans for automatically closing the supply of gas thereto when the jethas been extinguished without turning a cock to shut off the gas-supply.

The object of my invention I accomplish 'in the manner and by the meanshereinafter described and claimed, reference being made toV theaccompanying drawings, in which- Figure l is a vertical central sectionof a burner provided with my cut-oft' device. Fig. 2 is a side elevationthereof with part broken away. Fig. 3 is averlical section in the planexx, Fig. 2. Fig. 4 is a central section of a modification thereof on asmaller scale than the preceding iigures. Fig. 5 is a side eleva-- tionof the same with part broken away.

Similar letters indicate corresponding parts. In the drawings, theletter A designates a burner which is tapped out at one end so that itcan be secured to the gas-pipe, and in its other cnd is fitted asuitable tip, as usual. Near the lower end of the burner is formed avalve-casing, B, which is divided by a horizontal diaphragm, b, thatalso closes this end of the burner from communication with the gas inthe pipe,and in this diaphragm is a gasinlet orifice, c, which iscontrolled by a diskvalve, O, that opens upward and is provided with asuitable seat. The stem c of the valve extends outward through thecasing, and is in connection with a valve operating device which holdsthe valve off its seat, so as to allow the gas tov enter the burnerthrough the orifice c before and subsequent to ignitiombut causes thevalve to fall and close upon its seat when the gas-jet is blown out orextinguished in any flask or chamber, D, located in close proxim ity tothe burner and hermetically sealed by a diaphragm, E, which is securedthereto in anysuitable manner, and is made ot" an elastic material, suchas rubber. This flask or chamber D is located in a suitable casing, E',that i's secured to the burner, and is provided with a neck, e,. thatcloses about the upper end of the tube or chamber, so as to hohl thesame firmly in an upright position. A button, F, having a tlaring head,rests upon the diaphragrmaud a bent rod,G,is attached thereto, which isguided and can slide longitudinally in guides ,ffou the casing E. rod isprovided with a trip-pin, g, and a stop, f', at the lower end ot' therod prevents the same from being` drawn out ot1 its bearings as thediaphragm E is expanded. The valvestem of the .valve O is provided withan extension or valve rod, I, or it may be simply bent upward; but ineither case the rod is provided with a trip-pin, i, that is in a propposition to beengaged by one arm, j, of a lever, j J. The arm `.I of thelever is hookshaped, and is provided with a tooth, j, which is engagedby the trip-pin g on the followerrod G.

The lever J is pivoted at m to the casing E, land in order to throw theformer l'rom one position to another in turning on the gas, as will bepresently explained, a knob, M, is attached thereto.

The operation of the device is asfollows: Suppose that the gas is notignited, the valve O is down on its seat, and the diaphragm is notdistended, all as shown by full lines in Fig. 2,. which represents thenormal position ot the operating parts. To turn on the supply of gas theknob M is turned in the direction of arrow 1,Fig. 2, until the arm J ofthe lever j Jst-rikes against the trip-pin g, asshown by semidottedlines. lever the arm 7 thereof engages the pin t' and The follower-During this motion of the s carries the valve-rod I upward,consequently.

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body ofthe arm J of leverj J, and forces the latter back ward until therod has been drawn up to such a height that the pin g engages with theextreme end of the hook, whence the parts will have assumed the positionshown by dotted lines in Fig- 2 and by full lines in Fig. 8, andwill'remainin this position until the. gas 'is extinguished in somemanner-say is blown out. In suoli a case the contents of the tube orchamber D cool and the diaphragm relaxes, which allows the followerrodgradually to fall, and the pin thereon disengages the arm J as soon asit falls below the tooth j. The valverod being now free, the valve fallson its seat from gravity and stops the exit of gas.

In the modification shown in Figs. 4 and 5 the valve is subjected totheaction of aspring, N, which constantly tends to hold the same on itsseat, andthe button Fis connected directly to the valve-stem c bythevalve-rod 1*, so that as-the diaphragm is raised or distended the valveis lil'ted from its seat, and vice versa. To turn on the gas I make useof a cam, J ii, which is pivoted to the casing and which engages with apin. ffii, on the valve-rod. The cam is turned to lift the valve-rod,and consequently the valve from its seat, by au arm, O. The full linesin Fig. 5 show the device in its normal position wiih the valve down onits seat and the diaphragm or covering not distended. To turn on the gasthe cam is moved in the direction oi" arrow Z until it assumes the iposition shown by dotted lines, whereby the valve is lil'ted from itsscat. As the diaphragm or covering is distended the valve-rod l* islifted, and in the course of time the pin thereon goes ont ot' contactwith the cam, when the saine falls back into the position shown by fulllines. \Vhen the gas is extinguished, the

valve is gradually moved to its seat as the con-l tents oi' the liask orchamber cool and contract. Although this latter device will eiiectuallyinterrupt the exit otl gas, it will not accomplish this result asquickly as the device shown in Figs. 1,2, and 3, for the reason that inthe device shown in Figs. 4 and 5 the closing of the valve takes placewith the gradual relaxing of the diaphragm, since the two are rigidlyconnected with each other, while in the firstdescribed device thevalve-rod is not directly connected with the button, and after the jetis extinguishedthe diaphragm need only relax sufciently to cause the ping on the follower-rod G to clear` the tooth on the arm J, which distancemay be made as minute as desired.

The object of my invention is to provide a device for the purposedesignated which will act effectively and quickly, and thus prevent thefatal results frequently occurring from negligence or ignorance.

As the rapidity of action in closing the exit of gas after the llame isextinguished is an essential feature of such devices, I prefer to usealcohol as, an agent for expanding the diaphragm, as this liquid willvolatilize very rapidly, and vice versa.

Instead of a glass or metal chamber and an attached diaphragm, theentire chamber can be made of some elastic material and fitted into acasing which encompasses it, with the exception of one of itsends,whereby the same result is obtained.

What I claim as new, and desire to secure by Letters Patent, is-

l. 'Bhe combination, with a burner, of a valve, a closed expansible andcontractible chamber having a diaphragm at its upper end and located inclose proximity to the burner, a button resting on the diaphragm, and avertically-slidable rod for connecting the button with the valve,substantially as described.

2. The combination, with a gas burner, of a rising1 and falling valvehaving a stein, an expansible and contractible chamber having adiaphragm at its upper end and located in close proximity to the burner,a button resting on the diaphragm, and a rod-connection between thebut-ton and the valve, substantially as described.

3. The combination, with a gasburner, ofa rising and falling valve, anexpansible and contractible chamber having a diaphragm at its upper endand located in close proximity to the burner, a button resting on thediaphragnn'a verticallysliding rod connected with theabutton, and means,substantially as described, fory connecting the rod with the valve,whereby the rising` of the button lifts and opens the valve,substantially asd escri bed.

4. The combination, with a gas-burnerhaving avalve-chamber, B, providedwith a horizontal diaphragm, b, having an inlet-orifice, c, and dividingt-he chamber, ot' a valve, C, seating on said diaphragm, and having astem, c', extending to the exterior of the burner, an expansible andcontractible chamber, D, located in close proximity to the burner, abutton, F, resting on the upper end of the latter, and a slidablerod-connection between the button and the stem ofthe valve,substantially as described.

5. The combination, with the burner, of the valve C, the valve-rodthereof', the expansible and contractible chamber D, located in closeproximity to the burner, a follower-rod connected with the upper end ofthe chamber, and a lever-and-pin connection between the valverod and thefollo'wenrod, substantiall y as described.

6. The combination, with aburner, of a valve having a valve-stem, avertically-slidable rod connected with the valve-stem and having atrip-pin, a turning-lever for acting on said pin to lift said rod, anexpansible and contractible chamber having adiaphragm at its upper endand located in close proximity to the burner, and connections,substantially such as described, between the diaphragm and the slidingrod, substantially as described.

7. The combination, with the burner closed at one end, of thevalve-easing B, communieating with the burner and. the gas -supply ICOpipe, the valve C in said casing, the valve-rod the chamber, and havingthe pin g, the swinging lever J, having the arm j and the hook j', andthe handle or knob M, substantially as described.

8. The combination, withthe burner, of the gravitating valve C,controlling the fgas-supply, the valve-rod I thereof, the expansiblechamber D, located in close proximity to the burner, the follower-rod G,in connection with the chamber, the pins i and gon the valve' andfollower rods, the lever j J, having a hookshaped arm engaged bythe pinon the followerrod, and an arm engaging the pin on the valverod,substantially as shown and described.

9. The combination, with aburner closed at Y one end, of a valve-casing,B, communicating with the burner and the gas-supply pipe, of thegravitating'valve C in said casing, the valve-rod I thereof, the casingE', the expansible chamberD therein, said casingand chamber located inclose proximity to the burner, the button F, in connection with thechamber, the follower-rod G, the pins i and g on the valve and followerrods, and the lever j J engaging the pins i and g, substantially asshown and described.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

JosEPH W.v BIRCH. [1.. s]

Witnesses:

A. FABER DU FAUR, J r. E. F. KASTENHUBER.

